/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/avg20-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:24:56,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:24:56,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:24:56,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:24:56,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:24:56,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:24:56,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:24:56,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:24:56,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:24:56,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:24:56,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:24:56,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:24:56,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:24:56,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:24:56,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:24:56,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:24:56,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:24:56,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:24:56,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:24:56,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:24:56,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:24:56,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:24:56,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:24:56,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:24:56,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:24:56,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:24:56,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:24:56,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:24:56,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:24:56,491 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:24:56,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:24:56,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:24:56,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:24:56,493 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:24:56,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:24:56,494 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:24:56,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:24:56,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:24:56,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:24:56,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:24:56,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:24:56,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:24:56,495 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:24:56,495 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:24:56,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:24:56,496 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:24:56,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:24:56,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:24:56,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:24:56,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:24:56,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:24:56,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:24:56,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:24:56,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:24:56,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:24:56,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:24:56,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:24:56,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:24:56,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:24:56,794 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:24:56,811 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:24:56,814 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:24:56,816 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:24:56,817 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:24:56,818 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg20-2.i [2019-11-23 22:24:56,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95512ae80/19bbe7823343476abf468081eabee301/FLAGae1f50a1b [2019-11-23 22:24:57,390 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:24:57,391 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg20-2.i [2019-11-23 22:24:57,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95512ae80/19bbe7823343476abf468081eabee301/FLAGae1f50a1b [2019-11-23 22:24:57,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95512ae80/19bbe7823343476abf468081eabee301 [2019-11-23 22:24:57,775 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:24:57,777 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:24:57,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:24:57,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:24:57,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:24:57,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:24:57" (1/1) ... [2019-11-23 22:24:57,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab91c08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:57, skipping insertion in model container [2019-11-23 22:24:57,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:24:57" (1/1) ... [2019-11-23 22:24:57,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:24:57,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:24:58,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:24:58,041 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:24:58,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:24:58,076 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:24:58,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:58 WrapperNode [2019-11-23 22:24:58,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:24:58,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:24:58,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:24:58,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:24:58,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:58" (1/1) ... [2019-11-23 22:24:58,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:58" (1/1) ... [2019-11-23 22:24:58,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:24:58,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:24:58,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:24:58,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:24:58,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:58" (1/1) ... [2019-11-23 22:24:58,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:58" (1/1) ... [2019-11-23 22:24:58,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:58" (1/1) ... [2019-11-23 22:24:58,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:58" (1/1) ... [2019-11-23 22:24:58,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:58" (1/1) ... [2019-11-23 22:24:58,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:58" (1/1) ... [2019-11-23 22:24:58,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:58" (1/1) ... [2019-11-23 22:24:58,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:24:58,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:24:58,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:24:58,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:24:58,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:24:58,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:24:58,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:24:58,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:24:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:24:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:24:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:24:58,570 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:24:58,571 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:24:58,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:24:58 BoogieIcfgContainer [2019-11-23 22:24:58,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:24:58,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:24:58,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:24:58,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:24:58,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:24:57" (1/3) ... [2019-11-23 22:24:58,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a531477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:24:58, skipping insertion in model container [2019-11-23 22:24:58,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:58" (2/3) ... [2019-11-23 22:24:58,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a531477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:24:58, skipping insertion in model container [2019-11-23 22:24:58,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:24:58" (3/3) ... [2019-11-23 22:24:58,581 INFO L109 eAbstractionObserver]: Analyzing ICFG avg20-2.i [2019-11-23 22:24:58,592 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:24:58,602 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:24:58,615 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:24:58,650 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:24:58,650 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:24:58,651 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:24:58,651 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:24:58,651 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:24:58,651 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:24:58,651 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:24:58,651 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:24:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 22:24:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:24:58,681 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:24:58,682 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:24:58,683 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:24:58,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:24:58,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 22:24:58,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:24:58,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158095337] [2019-11-23 22:24:58,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:24:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:24:58,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158095337] [2019-11-23 22:24:58,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:24:58,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:24:58,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55115940] [2019-11-23 22:24:58,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:24:58,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:24:58,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:24:58,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:24:58,926 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 22:24:58,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:24:58,977 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 22:24:58,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:24:58,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:24:58,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:24:58,988 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:24:58,989 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:24:58,992 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:24:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:24:59,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 22:24:59,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:24:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 22:24:59,025 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 22:24:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:24:59,026 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 22:24:59,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:24:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 22:24:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:24:59,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:24:59,027 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:24:59,028 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:24:59,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:24:59,028 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 22:24:59,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:24:59,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827582606] [2019-11-23 22:24:59,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:24:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:24:59,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827582606] [2019-11-23 22:24:59,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:24:59,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:24:59,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003880646] [2019-11-23 22:24:59,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:24:59,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:24:59,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:24:59,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:24:59,115 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 22:24:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:24:59,181 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 22:24:59,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:24:59,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:24:59,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:24:59,183 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:24:59,184 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:24:59,185 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:24:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:24:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 22:24:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:24:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 22:24:59,198 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 22:24:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:24:59,199 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 22:24:59,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:24:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 22:24:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:24:59,201 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:24:59,201 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:24:59,201 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:24:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:24:59,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 22:24:59,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:24:59,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363826669] [2019-11-23 22:24:59,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:24:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:24:59,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363826669] [2019-11-23 22:24:59,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:24:59,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:24:59,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074831737] [2019-11-23 22:24:59,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:24:59,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:24:59,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:24:59,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:24:59,340 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 22:24:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:24:59,357 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 22:24:59,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:24:59,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 22:24:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:24:59,359 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:24:59,359 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:24:59,360 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:24:59,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:24:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 22:24:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:24:59,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 22:24:59,366 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 22:24:59,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:24:59,369 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 22:24:59,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:24:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 22:24:59,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:24:59,371 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:24:59,371 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:24:59,372 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:24:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:24:59,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 22:24:59,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:24:59,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888419124] [2019-11-23 22:24:59,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:24:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:24:59,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888419124] [2019-11-23 22:24:59,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384958656] [2019-11-23 22:24:59,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:24:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:59,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:24:59,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:24:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:24:59,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:24:59,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:24:59,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244188432] [2019-11-23 22:24:59,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:24:59,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:24:59,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:24:59,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:24:59,635 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 22:24:59,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:24:59,666 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 22:24:59,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:24:59,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 22:24:59,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:24:59,668 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:24:59,668 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:24:59,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:24:59,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:24:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 22:24:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:24:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 22:24:59,675 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 22:24:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:24:59,675 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 22:24:59,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:24:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 22:24:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:24:59,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:24:59,677 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:24:59,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:24:59,882 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:24:59,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:24:59,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 22:24:59,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:24:59,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200151840] [2019-11-23 22:24:59,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:24:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:24:59,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200151840] [2019-11-23 22:24:59,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304397840] [2019-11-23 22:24:59,980 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:00,058 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:00,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:00,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:25:00,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:25:00,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:00,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 22:25:00,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410882060] [2019-11-23 22:25:00,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:25:00,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:00,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:25:00,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:25:00,085 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 22:25:00,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:00,131 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 22:25:00,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:25:00,134 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 22:25:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:00,135 INFO L225 Difference]: With dead ends: 59 [2019-11-23 22:25:00,135 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:25:00,136 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:25:00,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:25:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 22:25:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:25:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 22:25:00,141 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 22:25:00,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:00,142 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 22:25:00,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:25:00,142 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 22:25:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:25:00,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:00,143 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:00,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:00,353 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:00,354 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 22:25:00,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:00,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156284988] [2019-11-23 22:25:00,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:25:00,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156284988] [2019-11-23 22:25:00,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050507080] [2019-11-23 22:25:00,450 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:00,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:25:00,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:00,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:25:00,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:25:00,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:00,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 22:25:00,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558532479] [2019-11-23 22:25:00,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:25:00,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:00,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:25:00,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:25:00,543 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 22:25:00,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:00,658 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 22:25:00,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:25:00,658 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 22:25:00,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:00,659 INFO L225 Difference]: With dead ends: 71 [2019-11-23 22:25:00,659 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:25:00,660 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:25:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:25:00,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 22:25:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:25:00,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 22:25:00,666 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 22:25:00,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:00,666 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 22:25:00,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:25:00,666 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 22:25:00,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:25:00,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:00,667 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:00,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:00,871 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:00,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:00,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 22:25:00,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:00,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044446782] [2019-11-23 22:25:00,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:25:00,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044446782] [2019-11-23 22:25:00,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332924601] [2019-11-23 22:25:00,986 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:01,048 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:25:01,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:01,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:25:01,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 22:25:01,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:01,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 22:25:01,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394506940] [2019-11-23 22:25:01,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:25:01,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:01,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:25:01,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:25:01,088 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 22:25:01,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:01,228 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 22:25:01,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:25:01,229 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 22:25:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:01,230 INFO L225 Difference]: With dead ends: 85 [2019-11-23 22:25:01,230 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:25:01,231 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:25:01,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:25:01,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 22:25:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:25:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 22:25:01,245 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 22:25:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:01,246 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 22:25:01,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:25:01,248 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 22:25:01,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:25:01,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:01,250 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:01,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:01,459 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:01,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:01,459 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 22:25:01,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:01,460 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909950351] [2019-11-23 22:25:01,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 22:25:01,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909950351] [2019-11-23 22:25:01,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371420254] [2019-11-23 22:25:01,568 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:01,678 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:25:01,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:01,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:25:01,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 22:25:01,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:01,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 22:25:01,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623889898] [2019-11-23 22:25:01,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:25:01,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:01,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:25:01,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:01,723 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 22:25:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:01,818 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 22:25:01,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:25:01,819 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 22:25:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:01,822 INFO L225 Difference]: With dead ends: 99 [2019-11-23 22:25:01,822 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:25:01,824 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:01,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:25:01,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 22:25:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 22:25:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 22:25:01,836 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 22:25:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:01,837 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 22:25:01,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:25:01,837 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 22:25:01,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 22:25:01,840 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:01,840 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:02,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:02,041 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:02,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:02,042 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 22:25:02,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:02,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173224248] [2019-11-23 22:25:02,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 22:25:02,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173224248] [2019-11-23 22:25:02,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840168830] [2019-11-23 22:25:02,177 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:02,256 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 22:25:02,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:02,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:25:02,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 22:25:02,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:02,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 22:25:02,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460613424] [2019-11-23 22:25:02,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:25:02,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:02,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:25:02,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:02,304 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 22:25:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:02,364 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 22:25:02,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:25:02,364 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 22:25:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:02,365 INFO L225 Difference]: With dead ends: 107 [2019-11-23 22:25:02,365 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 22:25:02,366 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:02,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 22:25:02,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 22:25:02,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 22:25:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 22:25:02,379 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 22:25:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:02,379 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 22:25:02,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:25:02,381 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 22:25:02,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 22:25:02,382 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:02,382 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:02,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:02,587 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:02,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:02,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 22:25:02,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:02,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909579557] [2019-11-23 22:25:02,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:25:02,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909579557] [2019-11-23 22:25:02,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558819006] [2019-11-23 22:25:02,693 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:02,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:25:02,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:25:02,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:02,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:25:02,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910122116] [2019-11-23 22:25:02,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:25:02,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:02,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:25:02,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:25:02,781 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 22:25:02,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:02,832 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 22:25:02,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:25:02,833 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 22:25:02,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:02,833 INFO L225 Difference]: With dead ends: 110 [2019-11-23 22:25:02,834 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 22:25:02,834 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:25:02,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 22:25:02,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 22:25:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 22:25:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 22:25:02,851 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 22:25:02,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:02,851 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 22:25:02,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:25:02,852 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 22:25:02,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:25:02,876 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:02,876 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:03,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:03,077 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:03,077 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 22:25:03,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:03,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335012000] [2019-11-23 22:25:03,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:25:03,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335012000] [2019-11-23 22:25:03,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628929885] [2019-11-23 22:25:03,213 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:03,280 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:03,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:03,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:25:03,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:25:03,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:03,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:25:03,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872231996] [2019-11-23 22:25:03,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:25:03,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:03,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:25:03,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:03,319 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 22:25:03,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:03,352 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 22:25:03,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:25:03,352 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 22:25:03,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:03,353 INFO L225 Difference]: With dead ends: 112 [2019-11-23 22:25:03,353 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 22:25:03,354 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:03,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 22:25:03,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 22:25:03,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 22:25:03,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 22:25:03,359 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 22:25:03,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:03,360 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 22:25:03,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:25:03,360 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 22:25:03,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 22:25:03,361 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:03,361 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:03,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:03,565 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:03,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:03,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 22:25:03,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:03,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846325172] [2019-11-23 22:25:03,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:25:03,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846325172] [2019-11-23 22:25:03,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865563459] [2019-11-23 22:25:03,681 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:03,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:25:03,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:03,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:25:03,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 22:25:03,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:03,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 22:25:03,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027930458] [2019-11-23 22:25:03,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:25:03,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:03,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:25:03,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:25:03,864 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 22:25:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:03,944 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 22:25:03,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:25:03,945 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 22:25:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:03,946 INFO L225 Difference]: With dead ends: 117 [2019-11-23 22:25:03,946 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 22:25:03,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:25:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 22:25:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 22:25:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 22:25:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 22:25:03,956 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 22:25:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:03,957 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 22:25:03,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:25:03,957 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 22:25:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 22:25:03,962 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:03,963 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:04,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:04,175 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:04,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:04,176 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 22:25:04,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:04,177 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677632443] [2019-11-23 22:25:04,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:25:04,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677632443] [2019-11-23 22:25:04,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879677616] [2019-11-23 22:25:04,352 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:04,441 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:25:04,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:04,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:25:04,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:25:04,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:04,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 22:25:04,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204230908] [2019-11-23 22:25:04,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:25:04,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:04,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:25:04,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:25:04,471 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 22:25:04,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:04,514 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 22:25:04,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:25:04,515 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 22:25:04,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:04,516 INFO L225 Difference]: With dead ends: 120 [2019-11-23 22:25:04,516 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 22:25:04,517 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:25:04,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 22:25:04,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 22:25:04,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 22:25:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 22:25:04,525 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 22:25:04,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:04,526 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 22:25:04,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:25:04,526 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 22:25:04,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 22:25:04,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:04,527 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:04,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:04,731 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:04,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:04,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 22:25:04,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:04,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561988837] [2019-11-23 22:25:04,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:25:04,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561988837] [2019-11-23 22:25:04,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444235758] [2019-11-23 22:25:04,891 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:05,203 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:25:05,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:05,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:25:05,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 22:25:05,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:05,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 22:25:05,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229952223] [2019-11-23 22:25:05,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:25:05,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:05,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:25:05,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:25:05,279 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2019-11-23 22:25:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:05,400 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2019-11-23 22:25:05,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:25:05,401 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2019-11-23 22:25:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:05,402 INFO L225 Difference]: With dead ends: 131 [2019-11-23 22:25:05,402 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 22:25:05,402 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:25:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 22:25:05,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2019-11-23 22:25:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 22:25:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 22:25:05,408 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-11-23 22:25:05,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:05,408 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 22:25:05,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:25:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 22:25:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 22:25:05,409 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:05,410 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:05,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:05,616 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:05,616 INFO L82 PathProgramCache]: Analyzing trace with hash -87813062, now seen corresponding path program 12 times [2019-11-23 22:25:05,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:05,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518482640] [2019-11-23 22:25:05,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 22:25:05,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518482640] [2019-11-23 22:25:05,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119516804] [2019-11-23 22:25:05,789 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:06,098 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 22:25:06,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:06,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:25:06,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-23 22:25:06,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:06,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 22:25:06,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74833098] [2019-11-23 22:25:06,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:25:06,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:06,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:25:06,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:25:06,194 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 20 states. [2019-11-23 22:25:06,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:06,266 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-23 22:25:06,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:25:06,267 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-11-23 22:25:06,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:06,267 INFO L225 Difference]: With dead ends: 139 [2019-11-23 22:25:06,268 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 22:25:06,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:25:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 22:25:06,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 22:25:06,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 22:25:06,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-23 22:25:06,273 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 79 [2019-11-23 22:25:06,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:06,274 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-23 22:25:06,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:25:06,274 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-23 22:25:06,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 22:25:06,275 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:06,275 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:06,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:06,479 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:06,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:06,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 13 times [2019-11-23 22:25:06,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:06,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650549140] [2019-11-23 22:25:06,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:25:06,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650549140] [2019-11-23 22:25:06,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326781103] [2019-11-23 22:25:06,644 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:06,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:25:06,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:25:06,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:06,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 22:25:06,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518025681] [2019-11-23 22:25:06,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:25:06,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:06,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:25:06,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:25:06,734 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2019-11-23 22:25:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:06,779 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-23 22:25:06,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:25:06,780 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2019-11-23 22:25:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:06,781 INFO L225 Difference]: With dead ends: 142 [2019-11-23 22:25:06,781 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 22:25:06,781 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:25:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 22:25:06,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 22:25:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 22:25:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 22:25:06,786 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2019-11-23 22:25:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:06,786 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 22:25:06,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:25:06,787 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 22:25:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 22:25:06,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:06,787 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:06,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:06,991 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:06,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:06,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1032577844, now seen corresponding path program 14 times [2019-11-23 22:25:06,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:06,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47218742] [2019-11-23 22:25:06,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:25:07,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47218742] [2019-11-23 22:25:07,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007079795] [2019-11-23 22:25:07,190 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:07,293 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:07,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:07,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:25:07,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:25:07,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:07,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:25:07,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198276848] [2019-11-23 22:25:07,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:25:07,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:07,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:25:07,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:25:07,322 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 18 states. [2019-11-23 22:25:07,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:07,385 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-23 22:25:07,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:25:07,386 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-11-23 22:25:07,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:07,387 INFO L225 Difference]: With dead ends: 144 [2019-11-23 22:25:07,387 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 22:25:07,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:25:07,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 22:25:07,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 22:25:07,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 22:25:07,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 22:25:07,393 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2019-11-23 22:25:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:07,394 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 22:25:07,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:25:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 22:25:07,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 22:25:07,395 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:07,395 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:07,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:07,607 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:07,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:07,608 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 15 times [2019-11-23 22:25:07,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:07,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491514728] [2019-11-23 22:25:07,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:25:07,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491514728] [2019-11-23 22:25:07,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788217492] [2019-11-23 22:25:07,781 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:07,911 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:25:07,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:07,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:25:07,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 22:25:08,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:08,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 22:25:08,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363303942] [2019-11-23 22:25:08,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:25:08,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:08,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:25:08,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:25:08,034 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 24 states. [2019-11-23 22:25:08,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:08,125 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2019-11-23 22:25:08,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:25:08,125 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2019-11-23 22:25:08,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:08,126 INFO L225 Difference]: With dead ends: 149 [2019-11-23 22:25:08,126 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 22:25:08,127 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:25:08,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 22:25:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-23 22:25:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 22:25:08,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 22:25:08,131 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 87 [2019-11-23 22:25:08,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:08,131 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 22:25:08,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:25:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 22:25:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 22:25:08,132 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:08,132 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:08,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:08,337 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:08,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:08,338 INFO L82 PathProgramCache]: Analyzing trace with hash -400970066, now seen corresponding path program 16 times [2019-11-23 22:25:08,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:08,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308549256] [2019-11-23 22:25:08,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:25:08,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308549256] [2019-11-23 22:25:08,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120047589] [2019-11-23 22:25:08,685 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:08,753 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:25:08,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:08,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:25:08,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-23 22:25:08,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:08,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 22:25:08,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836050790] [2019-11-23 22:25:08,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:25:08,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:08,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:25:08,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:25:08,895 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 25 states. [2019-11-23 22:25:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:09,081 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2019-11-23 22:25:09,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:25:09,081 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 91 [2019-11-23 22:25:09,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:09,082 INFO L225 Difference]: With dead ends: 161 [2019-11-23 22:25:09,082 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 22:25:09,082 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:25:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 22:25:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2019-11-23 22:25:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 22:25:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-23 22:25:09,085 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2019-11-23 22:25:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:09,085 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-23 22:25:09,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:25:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-23 22:25:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 22:25:09,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:09,086 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:09,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:09,287 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:09,288 INFO L82 PathProgramCache]: Analyzing trace with hash 169708650, now seen corresponding path program 17 times [2019-11-23 22:25:09,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:09,289 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340642692] [2019-11-23 22:25:09,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 22:25:09,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340642692] [2019-11-23 22:25:09,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882175640] [2019-11-23 22:25:09,504 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:09,939 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 22:25:09,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:09,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:25:09,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2019-11-23 22:25:10,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:10,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 22:25:10,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425302543] [2019-11-23 22:25:10,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:25:10,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:10,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:25:10,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:25:10,051 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 27 states. [2019-11-23 22:25:10,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:10,288 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-23 22:25:10,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:25:10,293 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 99 [2019-11-23 22:25:10,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:10,294 INFO L225 Difference]: With dead ends: 175 [2019-11-23 22:25:10,294 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 22:25:10,295 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:25:10,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 22:25:10,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2019-11-23 22:25:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 22:25:10,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-11-23 22:25:10,299 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2019-11-23 22:25:10,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:10,299 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-11-23 22:25:10,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:25:10,299 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-11-23 22:25:10,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 22:25:10,300 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:10,300 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:10,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:10,506 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:10,506 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 18 times [2019-11-23 22:25:10,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:10,507 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483675890] [2019-11-23 22:25:10,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 22:25:10,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483675890] [2019-11-23 22:25:10,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168752065] [2019-11-23 22:25:10,735 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:11,338 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:25:11,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:11,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:25:11,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 22:25:11,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:11,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 22:25:11,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904909679] [2019-11-23 22:25:11,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:25:11,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:11,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:25:11,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:25:11,480 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 28 states. [2019-11-23 22:25:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:11,570 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2019-11-23 22:25:11,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:25:11,571 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2019-11-23 22:25:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:11,572 INFO L225 Difference]: With dead ends: 183 [2019-11-23 22:25:11,572 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 22:25:11,573 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:25:11,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 22:25:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-23 22:25:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 22:25:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 22:25:11,578 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2019-11-23 22:25:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:11,578 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 22:25:11,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:25:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 22:25:11,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 22:25:11,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:11,579 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:11,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:11,784 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:11,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1193239138, now seen corresponding path program 19 times [2019-11-23 22:25:11,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:11,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228276480] [2019-11-23 22:25:11,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:25:12,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228276480] [2019-11-23 22:25:12,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791120608] [2019-11-23 22:25:12,042 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:12,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:25:12,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:25:12,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:12,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 22:25:12,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050539642] [2019-11-23 22:25:12,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:25:12,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:12,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:25:12,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:25:12,140 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 23 states. [2019-11-23 22:25:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:12,198 INFO L93 Difference]: Finished difference Result 185 states and 193 transitions. [2019-11-23 22:25:12,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:25:12,200 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-23 22:25:12,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:12,201 INFO L225 Difference]: With dead ends: 185 [2019-11-23 22:25:12,201 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 22:25:12,202 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:25:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 22:25:12,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2019-11-23 22:25:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 22:25:12,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 22:25:12,218 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 22:25:12,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:12,219 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 22:25:12,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:25:12,219 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 22:25:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 22:25:12,219 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:12,219 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:12,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:12,427 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:12,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:12,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 20 times [2019-11-23 22:25:12,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:12,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988275369] [2019-11-23 22:25:12,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-23 22:25:12,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988275369] [2019-11-23 22:25:12,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912069125] [2019-11-23 22:25:12,535 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:12,612 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:12,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:12,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:25:12,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-23 22:25:12,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:12,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:25:12,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463974422] [2019-11-23 22:25:12,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:25:12,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:12,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:25:12,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:25:12,631 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 11 states. [2019-11-23 22:25:12,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:12,721 INFO L93 Difference]: Finished difference Result 178 states and 187 transitions. [2019-11-23 22:25:12,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:25:12,721 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 113 [2019-11-23 22:25:12,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:12,722 INFO L225 Difference]: With dead ends: 178 [2019-11-23 22:25:12,722 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 22:25:12,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:25:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 22:25:12,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2019-11-23 22:25:12,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 22:25:12,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2019-11-23 22:25:12,729 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 113 [2019-11-23 22:25:12,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:12,729 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2019-11-23 22:25:12,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:25:12,729 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2019-11-23 22:25:12,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 22:25:12,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:12,730 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:12,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:12,934 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:12,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:12,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1096852194, now seen corresponding path program 21 times [2019-11-23 22:25:12,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:12,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464801149] [2019-11-23 22:25:12,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2019-11-23 22:25:13,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464801149] [2019-11-23 22:25:13,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80889179] [2019-11-23 22:25:13,052 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:13,270 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 22:25:13,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:13,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:25:13,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2019-11-23 22:25:13,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:13,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:25:13,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963889516] [2019-11-23 22:25:13,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:25:13,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:13,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:25:13,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:25:13,295 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 11 states. [2019-11-23 22:25:13,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:13,330 INFO L93 Difference]: Finished difference Result 146 states and 151 transitions. [2019-11-23 22:25:13,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:25:13,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 119 [2019-11-23 22:25:13,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:13,333 INFO L225 Difference]: With dead ends: 146 [2019-11-23 22:25:13,333 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 22:25:13,333 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:25:13,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 22:25:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2019-11-23 22:25:13,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-23 22:25:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2019-11-23 22:25:13,338 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 119 [2019-11-23 22:25:13,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:13,338 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2019-11-23 22:25:13,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:25:13,338 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2019-11-23 22:25:13,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-23 22:25:13,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:13,339 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:13,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:13,544 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:13,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:13,544 INFO L82 PathProgramCache]: Analyzing trace with hash 716041244, now seen corresponding path program 22 times [2019-11-23 22:25:13,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:13,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448331791] [2019-11-23 22:25:13,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2019-11-23 22:25:13,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448331791] [2019-11-23 22:25:13,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762126503] [2019-11-23 22:25:13,693 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:13,780 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:25:13,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:13,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:25:13,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2019-11-23 22:25:13,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:13,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:25:13,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889653750] [2019-11-23 22:25:13,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:25:13,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:13,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:25:13,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:13,823 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 12 states. [2019-11-23 22:25:13,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:13,950 INFO L93 Difference]: Finished difference Result 192 states and 201 transitions. [2019-11-23 22:25:13,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:25:13,951 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 121 [2019-11-23 22:25:13,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:13,952 INFO L225 Difference]: With dead ends: 192 [2019-11-23 22:25:13,952 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 22:25:13,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:13,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 22:25:13,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2019-11-23 22:25:13,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-11-23 22:25:13,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2019-11-23 22:25:13,958 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 121 [2019-11-23 22:25:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:13,959 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2019-11-23 22:25:13,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:25:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2019-11-23 22:25:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-23 22:25:13,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:13,961 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:14,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:14,166 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:14,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2118826522, now seen corresponding path program 23 times [2019-11-23 22:25:14,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:14,166 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700333272] [2019-11-23 22:25:14,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2019-11-23 22:25:14,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700333272] [2019-11-23 22:25:14,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524421355] [2019-11-23 22:25:14,282 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:16,147 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-23 22:25:16,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:16,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:25:16,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2019-11-23 22:25:16,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:16,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2019-11-23 22:25:16,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554831896] [2019-11-23 22:25:16,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:25:16,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:16,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:25:16,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:25:16,281 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 21 states. [2019-11-23 22:25:16,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:16,475 INFO L93 Difference]: Finished difference Result 205 states and 215 transitions. [2019-11-23 22:25:16,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:25:16,476 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 127 [2019-11-23 22:25:16,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:16,477 INFO L225 Difference]: With dead ends: 205 [2019-11-23 22:25:16,477 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 22:25:16,478 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:25:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 22:25:16,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2019-11-23 22:25:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 22:25:16,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2019-11-23 22:25:16,499 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 127 [2019-11-23 22:25:16,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:16,499 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2019-11-23 22:25:16,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:25:16,499 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2019-11-23 22:25:16,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 22:25:16,500 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:16,500 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:16,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:16,706 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:16,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:16,706 INFO L82 PathProgramCache]: Analyzing trace with hash 441608726, now seen corresponding path program 24 times [2019-11-23 22:25:16,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:16,707 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005185812] [2019-11-23 22:25:16,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2019-11-23 22:25:16,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005185812] [2019-11-23 22:25:16,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668501893] [2019-11-23 22:25:16,874 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:19,998 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:25:19,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:20,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:25:20,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2019-11-23 22:25:20,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:20,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-11-23 22:25:20,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037953493] [2019-11-23 22:25:20,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:25:20,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:20,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:25:20,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:25:20,163 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 23 states. [2019-11-23 22:25:20,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:20,343 INFO L93 Difference]: Finished difference Result 219 states and 229 transitions. [2019-11-23 22:25:20,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:25:20,344 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 135 [2019-11-23 22:25:20,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:20,344 INFO L225 Difference]: With dead ends: 219 [2019-11-23 22:25:20,345 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 22:25:20,345 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:25:20,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 22:25:20,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2019-11-23 22:25:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-11-23 22:25:20,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2019-11-23 22:25:20,349 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 135 [2019-11-23 22:25:20,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:20,349 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2019-11-23 22:25:20,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:25:20,349 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2019-11-23 22:25:20,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-23 22:25:20,350 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:20,350 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:20,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:20,556 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:20,557 INFO L82 PathProgramCache]: Analyzing trace with hash 42151186, now seen corresponding path program 25 times [2019-11-23 22:25:20,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:20,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278611759] [2019-11-23 22:25:20,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2019-11-23 22:25:20,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278611759] [2019-11-23 22:25:20,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647691284] [2019-11-23 22:25:20,728 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:20,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:25:20,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2019-11-23 22:25:20,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:20,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 22:25:20,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124712170] [2019-11-23 22:25:20,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:25:20,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:20,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:25:20,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:25:20,881 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 15 states. [2019-11-23 22:25:21,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:21,007 INFO L93 Difference]: Finished difference Result 230 states and 239 transitions. [2019-11-23 22:25:21,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:25:21,008 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 143 [2019-11-23 22:25:21,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:21,009 INFO L225 Difference]: With dead ends: 230 [2019-11-23 22:25:21,009 INFO L226 Difference]: Without dead ends: 153 [2019-11-23 22:25:21,009 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:25:21,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-11-23 22:25:21,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2019-11-23 22:25:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-23 22:25:21,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2019-11-23 22:25:21,014 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 143 [2019-11-23 22:25:21,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:21,014 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2019-11-23 22:25:21,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:25:21,014 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2019-11-23 22:25:21,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-23 22:25:21,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:21,015 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:21,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:21,219 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:21,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:21,220 INFO L82 PathProgramCache]: Analyzing trace with hash 42764432, now seen corresponding path program 26 times [2019-11-23 22:25:21,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:21,221 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35056576] [2019-11-23 22:25:21,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2019-11-23 22:25:21,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35056576] [2019-11-23 22:25:21,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687165355] [2019-11-23 22:25:21,436 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:21,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:21,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:21,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:25:21,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2019-11-23 22:25:21,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:21,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 22:25:21,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266363629] [2019-11-23 22:25:21,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:25:21,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:21,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:25:21,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:25:21,572 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 16 states. [2019-11-23 22:25:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:21,735 INFO L93 Difference]: Finished difference Result 240 states and 249 transitions. [2019-11-23 22:25:21,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:25:21,736 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 149 [2019-11-23 22:25:21,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:21,737 INFO L225 Difference]: With dead ends: 240 [2019-11-23 22:25:21,738 INFO L226 Difference]: Without dead ends: 159 [2019-11-23 22:25:21,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:25:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-11-23 22:25:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2019-11-23 22:25:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 22:25:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2019-11-23 22:25:21,747 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 149 [2019-11-23 22:25:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:21,748 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2019-11-23 22:25:21,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:25:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2019-11-23 22:25:21,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 22:25:21,749 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:21,749 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 13, 13, 13, 13, 13, 13, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:21,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:21,954 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:21,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:21,954 INFO L82 PathProgramCache]: Analyzing trace with hash 318631310, now seen corresponding path program 27 times [2019-11-23 22:25:21,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:21,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398999934] [2019-11-23 22:25:21,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1007 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2019-11-23 22:25:22,138 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398999934] [2019-11-23 22:25:22,138 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507874159] [2019-11-23 22:25:22,138 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:22,693 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-23 22:25:22,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:22,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:25:22,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1007 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2019-11-23 22:25:22,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:22,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 22:25:22,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730349639] [2019-11-23 22:25:22,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:25:22,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:22,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:25:22,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:25:22,732 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 14 states. [2019-11-23 22:25:22,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:22,775 INFO L93 Difference]: Finished difference Result 192 states and 197 transitions. [2019-11-23 22:25:22,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:25:22,775 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 155 [2019-11-23 22:25:22,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:22,776 INFO L225 Difference]: With dead ends: 192 [2019-11-23 22:25:22,777 INFO L226 Difference]: Without dead ends: 159 [2019-11-23 22:25:22,777 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:25:22,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-11-23 22:25:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2019-11-23 22:25:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-11-23 22:25:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2019-11-23 22:25:22,783 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 155 [2019-11-23 22:25:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:22,783 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2019-11-23 22:25:22,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:25:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2019-11-23 22:25:22,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-23 22:25:22,784 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:22,784 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:22,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:22,990 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:22,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:22,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1467404428, now seen corresponding path program 28 times [2019-11-23 22:25:22,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:22,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715925278] [2019-11-23 22:25:22,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2019-11-23 22:25:23,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715925278] [2019-11-23 22:25:23,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848528852] [2019-11-23 22:25:23,231 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:23,354 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:25:23,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:23,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:25:23,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 859 trivial. 0 not checked. [2019-11-23 22:25:23,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:23,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2019-11-23 22:25:23,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099057530] [2019-11-23 22:25:23,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:25:23,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:23,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:25:23,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:25:23,583 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 28 states. [2019-11-23 22:25:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:23,848 INFO L93 Difference]: Finished difference Result 257 states and 267 transitions. [2019-11-23 22:25:23,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:25:23,848 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 157 [2019-11-23 22:25:23,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:23,850 INFO L225 Difference]: With dead ends: 257 [2019-11-23 22:25:23,850 INFO L226 Difference]: Without dead ends: 170 [2019-11-23 22:25:23,850 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:25:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-23 22:25:23,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2019-11-23 22:25:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-11-23 22:25:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2019-11-23 22:25:23,855 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 157 [2019-11-23 22:25:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:23,856 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2019-11-23 22:25:23,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:25:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2019-11-23 22:25:23,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-23 22:25:23,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:23,857 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 14, 14, 14, 14, 14, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:24,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:24,061 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:24,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:24,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1161483384, now seen corresponding path program 29 times [2019-11-23 22:25:24,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:24,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467674471] [2019-11-23 22:25:24,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2019-11-23 22:25:24,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467674471] [2019-11-23 22:25:24,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869279873] [2019-11-23 22:25:24,363 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:30,522 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-23 22:25:30,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:30,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:25:30,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2019-11-23 22:25:30,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:30,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2019-11-23 22:25:30,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240024586] [2019-11-23 22:25:30,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:25:30,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:30,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:25:30,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:25:30,738 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand 30 states. [2019-11-23 22:25:31,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:31,000 INFO L93 Difference]: Finished difference Result 271 states and 281 transitions. [2019-11-23 22:25:31,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:25:31,001 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 165 [2019-11-23 22:25:31,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:31,002 INFO L225 Difference]: With dead ends: 271 [2019-11-23 22:25:31,003 INFO L226 Difference]: Without dead ends: 178 [2019-11-23 22:25:31,004 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:25:31,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-11-23 22:25:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2019-11-23 22:25:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-11-23 22:25:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2019-11-23 22:25:31,009 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 165 [2019-11-23 22:25:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:31,009 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2019-11-23 22:25:31,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:25:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2019-11-23 22:25:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-23 22:25:31,010 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:31,010 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 15, 15, 15, 15, 15, 15, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:31,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:31,218 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:31,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:31,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1120642684, now seen corresponding path program 30 times [2019-11-23 22:25:31,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:31,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979997718] [2019-11-23 22:25:31,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2019-11-23 22:25:31,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979997718] [2019-11-23 22:25:31,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349984788] [2019-11-23 22:25:31,428 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:44,287 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 22:25:44,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:44,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:25:44,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2019-11-23 22:25:44,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:44,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 22:25:44,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505075653] [2019-11-23 22:25:44,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:25:44,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:44,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:25:44,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:25:44,340 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 19 states. [2019-11-23 22:25:44,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:44,505 INFO L93 Difference]: Finished difference Result 282 states and 291 transitions. [2019-11-23 22:25:44,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:25:44,507 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 173 [2019-11-23 22:25:44,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:44,508 INFO L225 Difference]: With dead ends: 282 [2019-11-23 22:25:44,508 INFO L226 Difference]: Without dead ends: 183 [2019-11-23 22:25:44,509 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:25:44,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-11-23 22:25:44,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2019-11-23 22:25:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-23 22:25:44,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2019-11-23 22:25:44,515 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 173 [2019-11-23 22:25:44,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:44,515 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2019-11-23 22:25:44,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:25:44,515 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2019-11-23 22:25:44,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-23 22:25:44,516 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:44,516 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 16, 16, 16, 16, 16, 16, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:44,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:44,717 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:44,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:44,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1108038786, now seen corresponding path program 31 times [2019-11-23 22:25:44,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:44,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691892093] [2019-11-23 22:25:44,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-11-23 22:25:44,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691892093] [2019-11-23 22:25:44,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460037737] [2019-11-23 22:25:44,987 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:45,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:25:45,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-11-23 22:25:45,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:45,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 22:25:45,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546333031] [2019-11-23 22:25:45,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:25:45,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:45,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:25:45,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:25:45,124 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 20 states. [2019-11-23 22:25:45,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:45,287 INFO L93 Difference]: Finished difference Result 292 states and 301 transitions. [2019-11-23 22:25:45,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:25:45,287 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 179 [2019-11-23 22:25:45,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:45,289 INFO L225 Difference]: With dead ends: 292 [2019-11-23 22:25:45,289 INFO L226 Difference]: Without dead ends: 189 [2019-11-23 22:25:45,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:25:45,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-23 22:25:45,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2019-11-23 22:25:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-23 22:25:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2019-11-23 22:25:45,294 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 179 [2019-11-23 22:25:45,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:45,294 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2019-11-23 22:25:45,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:25:45,295 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2019-11-23 22:25:45,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-23 22:25:45,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:45,296 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 17, 17, 17, 17, 17, 17, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:45,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:45,500 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:45,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:45,500 INFO L82 PathProgramCache]: Analyzing trace with hash 839039232, now seen corresponding path program 32 times [2019-11-23 22:25:45,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:45,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246948870] [2019-11-23 22:25:45,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1436 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1147 trivial. 0 not checked. [2019-11-23 22:25:45,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246948870] [2019-11-23 22:25:45,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868364071] [2019-11-23 22:25:45,785 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:45,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:45,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:45,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:25:45,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1436 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1147 trivial. 0 not checked. [2019-11-23 22:25:45,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:45,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 22:25:45,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030015413] [2019-11-23 22:25:45,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:25:45,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:45,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:25:45,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:25:45,944 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 21 states. [2019-11-23 22:25:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:46,135 INFO L93 Difference]: Finished difference Result 302 states and 311 transitions. [2019-11-23 22:25:46,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:25:46,137 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 185 [2019-11-23 22:25:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:46,138 INFO L225 Difference]: With dead ends: 302 [2019-11-23 22:25:46,138 INFO L226 Difference]: Without dead ends: 195 [2019-11-23 22:25:46,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:25:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-23 22:25:46,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2019-11-23 22:25:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-23 22:25:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2019-11-23 22:25:46,144 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 185 [2019-11-23 22:25:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:46,144 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2019-11-23 22:25:46,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:25:46,144 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2019-11-23 22:25:46,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-23 22:25:46,145 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:46,146 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 18, 18, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:46,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:46,350 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:46,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1771366142, now seen corresponding path program 33 times [2019-11-23 22:25:46,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:46,351 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986250546] [2019-11-23 22:25:46,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1217 trivial. 0 not checked. [2019-11-23 22:25:46,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986250546] [2019-11-23 22:25:46,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695932742] [2019-11-23 22:25:46,637 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:47,162 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-11-23 22:25:47,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:47,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:25:47,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1372 trivial. 0 not checked. [2019-11-23 22:25:47,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:47,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 35 [2019-11-23 22:25:47,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502778628] [2019-11-23 22:25:47,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:25:47,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:47,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:25:47,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:25:47,497 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 35 states. [2019-11-23 22:25:47,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:47,816 INFO L93 Difference]: Finished difference Result 315 states and 325 transitions. [2019-11-23 22:25:47,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:25:47,816 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 191 [2019-11-23 22:25:47,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:47,818 INFO L225 Difference]: With dead ends: 315 [2019-11-23 22:25:47,818 INFO L226 Difference]: Without dead ends: 204 [2019-11-23 22:25:47,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:25:47,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-11-23 22:25:47,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2019-11-23 22:25:47,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-23 22:25:47,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2019-11-23 22:25:47,824 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 191 [2019-11-23 22:25:47,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:47,825 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2019-11-23 22:25:47,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:25:47,825 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2019-11-23 22:25:47,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-23 22:25:47,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:47,826 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:48,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:48,032 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:48,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:48,032 INFO L82 PathProgramCache]: Analyzing trace with hash -160023046, now seen corresponding path program 34 times [2019-11-23 22:25:48,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:48,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286469035] [2019-11-23 22:25:48,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1679 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1318 trivial. 0 not checked. [2019-11-23 22:25:48,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286469035] [2019-11-23 22:25:48,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806549383] [2019-11-23 22:25:48,334 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:48,452 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:25:48,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:48,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:25:48,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1679 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1318 trivial. 0 not checked. [2019-11-23 22:25:48,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:48,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 22:25:48,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939756958] [2019-11-23 22:25:48,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:25:48,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:48,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:25:48,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:25:48,508 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand 23 states. [2019-11-23 22:25:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:48,704 INFO L93 Difference]: Finished difference Result 323 states and 332 transitions. [2019-11-23 22:25:48,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:25:48,705 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 199 [2019-11-23 22:25:48,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:48,706 INFO L225 Difference]: With dead ends: 323 [2019-11-23 22:25:48,706 INFO L226 Difference]: Without dead ends: 206 [2019-11-23 22:25:48,707 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:25:48,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-23 22:25:48,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2019-11-23 22:25:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-11-23 22:25:48,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2019-11-23 22:25:48,712 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 199 [2019-11-23 22:25:48,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:48,712 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2019-11-23 22:25:48,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:25:48,712 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2019-11-23 22:25:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-11-23 22:25:48,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:48,713 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:48,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:48,917 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:48,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:48,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1230649480, now seen corresponding path program 35 times [2019-11-23 22:25:48,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:48,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436139795] [2019-11-23 22:25:48,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1796 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:25:49,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436139795] [2019-11-23 22:25:49,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872674711] [2019-11-23 22:25:49,131 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:53,400 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-23 22:25:53,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:53,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:25:53,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1796 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:25:53,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:53,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:25:53,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240082516] [2019-11-23 22:25:53,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:25:53,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:53,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:25:53,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:25:53,449 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand 18 states. [2019-11-23 22:25:53,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:53,501 INFO L93 Difference]: Finished difference Result 256 states and 261 transitions. [2019-11-23 22:25:53,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:25:53,502 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 205 [2019-11-23 22:25:53,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:53,504 INFO L225 Difference]: With dead ends: 256 [2019-11-23 22:25:53,504 INFO L226 Difference]: Without dead ends: 209 [2019-11-23 22:25:53,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:25:53,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-11-23 22:25:53,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2019-11-23 22:25:53,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-11-23 22:25:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2019-11-23 22:25:53,510 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 205 [2019-11-23 22:25:53,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:53,511 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2019-11-23 22:25:53,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:25:53,511 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2019-11-23 22:25:53,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-23 22:25:53,512 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:53,512 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:53,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:53,721 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:53,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:53,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2007603210, now seen corresponding path program 36 times [2019-11-23 22:25:53,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:53,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156912257] [2019-11-23 22:25:53,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:25:54,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156912257] [2019-11-23 22:25:54,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626006142] [2019-11-23 22:25:54,003 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:07,453 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 22:26:07,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:07,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:26:07,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:26:07,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:07,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 22:26:07,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213892426] [2019-11-23 22:26:07,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:26:07,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:07,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:26:07,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:26:07,521 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand 19 states. [2019-11-23 22:26:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:07,598 INFO L93 Difference]: Finished difference Result 258 states and 263 transitions. [2019-11-23 22:26:07,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:26:07,599 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 207 [2019-11-23 22:26:07,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:07,601 INFO L225 Difference]: With dead ends: 258 [2019-11-23 22:26:07,601 INFO L226 Difference]: Without dead ends: 211 [2019-11-23 22:26:07,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:26:07,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-11-23 22:26:07,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2019-11-23 22:26:07,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-11-23 22:26:07,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 214 transitions. [2019-11-23 22:26:07,608 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 214 transitions. Word has length 207 [2019-11-23 22:26:07,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:07,608 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 214 transitions. [2019-11-23 22:26:07,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:26:07,608 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 214 transitions. [2019-11-23 22:26:07,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-11-23 22:26:07,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:07,610 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:07,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:07,810 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:07,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:07,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1335828236, now seen corresponding path program 37 times [2019-11-23 22:26:07,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:07,811 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4668208] [2019-11-23 22:26:07,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:26:08,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4668208] [2019-11-23 22:26:08,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463562984] [2019-11-23 22:26:08,134 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:08,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:26:08,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:26:08,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:08,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 22:26:08,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733374414] [2019-11-23 22:26:08,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:26:08,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:08,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:26:08,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:26:08,324 INFO L87 Difference]: Start difference. First operand 210 states and 214 transitions. Second operand 20 states. [2019-11-23 22:26:08,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:08,382 INFO L93 Difference]: Finished difference Result 260 states and 265 transitions. [2019-11-23 22:26:08,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:26:08,383 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 209 [2019-11-23 22:26:08,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:08,384 INFO L225 Difference]: With dead ends: 260 [2019-11-23 22:26:08,384 INFO L226 Difference]: Without dead ends: 213 [2019-11-23 22:26:08,384 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:26:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-11-23 22:26:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2019-11-23 22:26:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-11-23 22:26:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2019-11-23 22:26:08,390 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 209 [2019-11-23 22:26:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:08,390 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2019-11-23 22:26:08,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:26:08,390 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2019-11-23 22:26:08,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-11-23 22:26:08,391 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:08,392 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:08,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:08,596 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:08,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:08,596 INFO L82 PathProgramCache]: Analyzing trace with hash -5172622, now seen corresponding path program 38 times [2019-11-23 22:26:08,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:08,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890696485] [2019-11-23 22:26:08,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1889 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:26:09,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890696485] [2019-11-23 22:26:09,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689984015] [2019-11-23 22:26:09,023 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:09,152 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:09,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:09,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:26:09,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1889 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:26:09,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:09,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 22:26:09,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165159381] [2019-11-23 22:26:09,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:26:09,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:09,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:26:09,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:26:09,225 INFO L87 Difference]: Start difference. First operand 212 states and 216 transitions. Second operand 21 states. [2019-11-23 22:26:09,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:09,294 INFO L93 Difference]: Finished difference Result 262 states and 267 transitions. [2019-11-23 22:26:09,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:26:09,294 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 211 [2019-11-23 22:26:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:09,295 INFO L225 Difference]: With dead ends: 262 [2019-11-23 22:26:09,295 INFO L226 Difference]: Without dead ends: 215 [2019-11-23 22:26:09,296 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:26:09,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-11-23 22:26:09,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2019-11-23 22:26:09,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-11-23 22:26:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 218 transitions. [2019-11-23 22:26:09,301 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 218 transitions. Word has length 211 [2019-11-23 22:26:09,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:09,302 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 218 transitions. [2019-11-23 22:26:09,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:26:09,302 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 218 transitions. [2019-11-23 22:26:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-11-23 22:26:09,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:09,303 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:09,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:09,508 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:09,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1145381776, now seen corresponding path program 39 times [2019-11-23 22:26:09,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:09,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404143790] [2019-11-23 22:26:09,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:26:09,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404143790] [2019-11-23 22:26:09,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460163913] [2019-11-23 22:26:09,820 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:11,808 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-11-23 22:26:11,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:11,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:26:11,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 22:26:11,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:11,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 22:26:11,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886046920] [2019-11-23 22:26:11,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:26:11,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:11,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:26:11,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:26:11,858 INFO L87 Difference]: Start difference. First operand 214 states and 218 transitions. Second operand 22 states. [2019-11-23 22:26:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:11,910 INFO L93 Difference]: Finished difference Result 263 states and 268 transitions. [2019-11-23 22:26:11,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:26:11,910 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 213 [2019-11-23 22:26:11,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:11,912 INFO L225 Difference]: With dead ends: 263 [2019-11-23 22:26:11,912 INFO L226 Difference]: Without dead ends: 216 [2019-11-23 22:26:11,913 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:26:11,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-11-23 22:26:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2019-11-23 22:26:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-11-23 22:26:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 220 transitions. [2019-11-23 22:26:11,918 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 220 transitions. Word has length 213 [2019-11-23 22:26:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:11,918 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 220 transitions. [2019-11-23 22:26:11,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:26:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 220 transitions. [2019-11-23 22:26:11,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-11-23 22:26:11,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:11,919 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:12,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:12,127 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:12,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1669718290, now seen corresponding path program 40 times [2019-11-23 22:26:12,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:12,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560059129] [2019-11-23 22:26:12,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat